Sitz baths are needed for medication changes after perianal abscess surgery. Sitz bath can clean the tissues around the patient’s anus, so as to keep the surgical wound clean, in addition, sitz bath can avoid the further aggravation of the infection after the perianal abscess surgery, so in the patient’s perianal abscess surgery after the change of medication still need to sitz bath, until the wound is completely healed. Patients can use a clean bath tub, diluted potassium permanganate solution poured into the tub, the ratio is 1:5000, so that the liquid can just soak to the traumatic tissue, it is recommended that patients sit in the bath lasts about 10 minutes each time, every day in the morning, before going to bed, and after the toilet sit in the bath once. It is recommended that patients follow the doctor’s instructions to use the medication, during the bath, in terms of diet, do not eat spicy stimulating food, avoid smoking and alcohol, to maintain a smooth bowel movement, and develop a good work and rest habits, do not stay up all night. Regular review, if found abnormal problems, timely treatment.